You know you're a cool dad when you take your three-year-old son to see Deadmau5 at Treasure Island Music Festival. You know you're an even cooler dad when you make an incredibly realistic (and labor-intensive) Deadmau5 costume, after your son decides he wants to be Deadmau5 for Halloween. But the ultimate cool-dad moment? When Deadmau5 posts a video of your project to his Facebook page and calls to congratulate you on it.
The dad was San Francisco's Michael Cobra, who also made this video documenting the entire project: